Hi i own a 2003 g35coupe manual 117k and have had codes for awhile now i am really trying to fix up these problems so that the car runs good and to prevent future repairs.I took to infiniti dealer and codes they gave me are : P0507, P0462, P1122, P1124, P1126, U1001 told me something was wrong with "throttle motor"
ANY information reguarding solving these issues would be greatly appreciated thanks for your time

 

You can google all diagnostic codes, and you will find out what everything means. 4 of the 5 "P" codes are related to the throttle body except the P0462, which is the fuel level sensor voltage too low. U1001 shows there is or was a loss of communication between the ECU and other sensors. How long has the light been on? How long have you owned this car? Have you tried to reset the ECU? Try a reset and see how long it takes for the codes to return, assuming the car is functioning properly.

 

http://www.6mt.net/forum/performance...rocedures.html
Might as well do ALL of these. One of them is the ECU reset, and another is an Idle Air Relearn procedure.Since you are throwing a code for the Idle Air, try and reset it, same for throttle position. Good luck! Some of these can be tricky. Timing is pretty critical.
Also, check battery voltage, and check and clean ground connections.